Best Answer: I have been a police officer for almost 40 years. Just like civilian communication, police communication has evolved over the years, Before two-way radios, officers could call into headquarters on call boxes, which were located at various locations on their beats. was just wondering, how exactly did police officers communicate with one another before cellphones were widely used (early 70s era specifically)?
3 Stars. Nitroglycerin is used to treat congestive heart failure, to help prevent frequent chest pain caused by a heart condition known as angina, and to relieve pain caused by chronic anal fissures. The drug is available under the brand names Nitromist, Nitrobid, Nitro-Dur, Nitrostat, Imdur, Isordil and Rectiv.
Nitroglycerin is used for the treatment and prevention of angina caused by coronary artery disease. Sublingual nitroglycerin and nitroglycerin spray are used to treat acute anginal attacks. Transdermal nitroglycerin, nitroglycerin ointment and capsules do not act rapidly enough to be used for acute anginal attacks. Nitroglycerin also is used intravenously to treat congestive heart failure associated with heart attack and high blood pressure during surgery.